moose

Moose Male (Bull) Female (Cow) Conservation status Least Concern (IUCN 3.1)[1] Scientific classification Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Artiodactyla Family: Cervidae Subfamily: Capreolinae Genus: Alces Gray, 1821 Species: A. alces Binomial name Alces alces (Linnaeus, 1758) Moose range map

Distribution of North-American subspecies

The moose (North America) or common elk (Europe), Alces alces, is the largest extant species in the deer family. Moose are distinguished by the palmate antlers of the males; other members of the family have antlers with a "twig-like" configuration. Moose typically inhabit boreal and mixed deciduous forests of the Northern Hemisphere in temperate to subarctic climates.

Naming and etymology

The animal bearing the name Alces alces is known in Europe as the elk and in North America and New Zealand as the moose.^[2] The name elk is connected with several earlier European variants—Latin: alces, Old Norse: elgr, Scandinavian: elg, älg or similar, and German: Elch—all of which refer to this animal.

Confusingly, the word elk in North America refers to the second largest deer species, Cervus canadensis, also known as the wapiti. Early European explorers in North America, who were familiar with the closely related but smaller red deer of Central and Western Europe, believed that the much larger North American animal looked more like the European elk (i.e. moose), so they named it elk.

The word moose is derived from the Algonquian Eastern Abnaki name moz, loosely translated as twig eater.^[3]

Moose is both singular and plural, unlike goose, which in the plural is geese.

Habitat and range

In North America, the moose range includes almost all of Canada, most of central and western Alaska, much of New England and upstate New York, the upper Rocky Mountains, Northeastern Minnesota, and Michigan's Upper Peninsula and Isle Royale in Lake Superior. Isolated moose populations have been verified as far south as the mountains of Utah and Colorado.^[4] In 1978 a few breeding pairs were introduced in western Colorado, and the state's moose population is now more than 1,000.

In Europe, moose are found in large numbers throughout Norway, Sweden, Finland and the Baltic States. They are also widespread through Russia. Small populations remain in Poland (Biebrza Nat. Park), Belarus and the Czech Republic.

Moose were successfully introduced on Newfoundland in 1904 where they are now the dominant ungulate, and somewhat less successfully on Anticosti Island in the Gulf of St. Lawrence. Ten moose were also introduced in Fiordland, New Zealand in 1910, but they were thought to have died off. Nevertheless, there have been reported sightings that were thought to be false until moose hair samples were found by a New Zealand scientist in 2002.^[5] In 2008 moose (or elk) were reintroduced in to the Scottish Highlands.

Subspecies

Biology and behavior

Antlers

A full grown bull from British Columbia with early (May) antlers

The male's antlers grow as cylindrical beams projecting on each side of the head at right angles to the midline of the skull, and then fork. The lower prong of this fork may be either simple, or divided into two or three tines, with some flattening.

In the North Siberian elk (A. a. bedfordiae), the posterior division of the main fork divides into three tines, with no distinct flattening. In the common elk (A. a. alces) this branch usually expands into a broad palmation, with one large tine at the base, and a number of smaller snags on the free border. There is, however, a Scandinavian breed of the common elk in which the antlers are simpler, and recall those of the East Siberian animals.

The palmation appears to be more marked in North American moose (Alces alces americanus) than in the typical Scandinavian elk.

A young female in Algonquin Park in early June

The male will drop its antlers after the mating season and conserve energy for the winter. A new set of antlers will then regrow in the spring. Antlers take three to five months to fully develop, making them one of the fastest growing animal organs. They initially have a layer of skin called felt which is shed once the antlers become fully grown. Immature bulls may not shed their antlers for the winter, but retain them until the following spring.

If a bull moose is castrated, either by accidental or chemical means, he will quickly shed his current set of antlers and then immediately begin to grow a new set of misshapen and deformed antlers that he will wear the rest of his life without ever shedding again. The distinctive looking appendages (often referred to as "devil's antlers") are the source of several myths and legends among many groups of Inuit as well as several other tribes of indigenous peoples of North America.^[6]

Size and weight

Crossing a river.

On average, an adult moose stands 1.8–2.1 m (6–7 ft) high at the shoulder.^[7] Males weigh 380–720 kg (850–1580 pounds) and females weigh 270–360 kg (600–800  pounds).^[8] The largest of all is the Alaskan subspecies (A. a. gigas), which can stand over 2.1 m (7 ft) at the shoulder, has a span across the antlers of 1.8 m (6 ft) and averages 634.5 kg (1,396 lbs) in males and 478 kg (1,052 lbs) in females.^[9] Typically, however, the antlers of a mature specimen are between 1.2 m (3.9 ft) and 1.5 m (4.9 ft). The largest confirmed size for this species was a bull shot at the Yukon River in September 1897 weighing 820 kg (1,800 lb) and was 233 cm (92 in) tall at the shoulder.^[10] The Moose of Alaska matches the extinct Irish Elk as the largest deer of all time.^[11] Behind only the bison, the Moose is the second largest land animal in both North America and Europe.

Social structure and reproduction

A cow moose with two newborn calves		and a cow with a three month old calf, in Alaska

Moose are mostly diurnal. They are generally solitary with the strongest bonds between mother and calf. Two individuals can sometimes be found feeding along the same stream. At night, both male and female moose of all ages will make a chirping sound, very similar to that of birds. These chirps are used like a "locator" beacon for other moose, and are made one sound at a time.

Mating occurs in September and October. The males are polygamous and will seek several females to breed with. During this times both sexes will call to each other. Males produce heavy grunting sounds that can be heard from up to 500 meters away, while females produce wail-like sounds.^[12] Males will fight for access to females. They either assess which is larger, with the smaller bull retreating, or they may engage in battles, usually only involving the antlers.

Female moose have an eight-month gestation period. Most litters consist of a single calf; however, twins are not uncommon and triplets are known to occur. Newborn moose have fur with a reddish hue in contrast to the brown appearance of an adult. The young will stay with the mother until just before the next young are born.

Natural predators

An Iron age saddle from Siberia, depicting a moose being hunted by a Siberian tiger

A moose battling a wolf pack, as illustrated in The Natural History of Quadrupeds by Frederick Shoberl, 1834

A full-grown moose has few enemies, but a pack of wolves can still pose a threat, especially to females with calves.^[13] Siberian Tigers ^[14] and Brown Bear^[15][16] are also known to prey on juvenile moose, although bears are more likely to take over a wolf kill than to hunt moose on their own.^[17] American Black Bears and Cougars can be significant predators of moose calves in May and June.^[18][19]

In some areas, moose are the primary source of food for wolves. Moose usually flee upon detecting wolves. Wolves usually follow moose at a distance of 100–400 meters, occasionally at a distance of 2–3 km. Attacks from wolves against young moose may last seconds, though sometimes they can be drawn out for days with adults. Sometimes, wolves will chase moose into shallow streams or onto frozen rivers, where their mobility is greatly impeded. Moose will sometimes stand their ground and defend themselves by charging at the wolves or lashing out at them with their powerful hooves. Wolves typically kill moose by tearing at their haunches and perineum, causing massive blood loss. Occasionally, a wolf may immobilise a moose by biting its sensitive nose, the pain of which can paralyze a moose.^[20] Wolf packs primarily target calves and elderly animals, but can and will take healthy, adult moose. Moose between the ages of two and eight are rarely killed by wolves.^[21] Though moose are usually hunted by packs, there are cases in which single wolves have successfully killed moose.^[22]

Moose as food

Moose scat is commonly found on trails. Some souvenir shops sell bags of it, sealed with shellac and labeled with humorous names

.

Moose are hunted as a game species in many of the countries where they are found. Moose meat tastes, wrote Henry David Thoreau in “The Maine Woods”, “like tender beef, with perhaps more flavour; sometimes like veal”. While the flesh has protein levels similar to other comparable red meats (e.g. beef, deer and elk) it has a low fat content and the fat that is found is made up of a higher proportion of polyunsaturated fats (rather than saturated fats).^[23]

Cadmium levels are high in Finnish elk liver and kidneys, with the result that consumption of these organs from elk more than one year old is prohibited in Finland.^[24] Cadmium intake has been found to be elevated amongst all consumers of elk meat, though the elk meat was found to contribute only slightly to the daily cadmium intake. However the consumption of moose liver or kidneys significantly increased cadmium intake, with the study revealing that heavy consumers of moose organs have a relatively narrow safety margin below the levels which would probably cause adverse health effects^[25].

History

A moose with reflection

European rock drawings and cave paintings reveal that moose have been hunted since the Stone Age. Excavations in Alby, Sweden adjacent to the Stora Alvaret have yielded elk antlers in wooden hut remains from 6,000 BC, indicating some of the earliest elk hunting in northern Europe. In northern Scandinavia one can still find remains of trapping pits used for hunting elk. These pits, which can be up to 4 × 7 m wide and 2 m deep, would have been camouflaged with branches and leaves. They would have had steep sides lined with planks, making it impossible for the elk to escape once it fell in. The pits are normally found in large groups, crossing the elk's regular paths and stretching over several kilometres. Remains of wooden fences designed to guide the animals toward the pits have been found in bogs and peat. In Norway, an early example of these trapping devices has been dated to around 3,700 BC. Trapping elk in pits is an extremely effective hunting method, and as early as the 16th century the Norwegian government tried to restrict their use. Nevertheless, the method was in use until the 19th century.

The earliest recorded description of the elk is in Julius Caesar's Commentarii de Bello Gallico, where it is described thus:

"There are also [animals] which are called elks. The shape of these, and the varied color of their skins, is much like roes, but in size they surpass them a little and are destitute of horns, and have legs without joints and ligatures; nor do they lie down for the purpose of rest, nor, if they have been thrown down by any accident, can they raise or lift themselves up. Trees serve as beds to them ; they lean themselves against them, and thus reclining only slightly, they take their rest; when the huntsmen have discovered from the footsteps of these animals whither they are accustomed to betake themselves, they either undermine all the trees at the roots, or cut into them so far that the upper part of the trees may appear to be left standing. When they have leant upon them, according to their habit, they knock down by their weight the unsupported trees, and fall down themselves along with them."^[26]

In book 8, chapter 16 of Pliny the Elder's Natural History from 77 AD the elk and an animal called achlis, which is presumably the same animal, are described thus:

"...there is, also, the elk, which strongly resembles our steers, except that it is distinguished by the length of the ears and of the neck. There is also the achlis, which is produced in the land of Scandinavia; it has never been seen in this city, although we have had descriptions of it from many persons; it is not unlike the elk, but has no joints in the hind leg. Hence, it never lies down, but reclines against a tree while it sleeps; it can only be taken by previously cutting into the tree, and thus laying a trap for it, as otherwise, it would escape through its swiftness. Its upper lip is so extremely large, for which reason it is obliged to go backwards when grazing; otherwise, by moving onwards, the lip would get doubled up."^[27]

Dr. Valerius Geist, who emigrated to Canada from the Soviet Union wrote in his 1999 book Moose: Behaviour, Ecology, Conservation:

"Those who care most passionately about moose are—paradoxically—hunters, in particular people who live in wilderness and rural communities and those who depend on moose for food. In Sweden, no fall menu is without a mouthwatering moose dish. The Swedes fence their highways to reduce moose fatalities and design moose-proof cars. Sweden is less than half as large as the Canadian province of British Columbia, but the annual take of moose in Sweden—upward of 150,000—is twice that of the total moose harvest in North America. That is how much Swedes cherish their moose."

Aggression

Moose are not usually aggressive towards humans, but can be provoked or frightened to behave with aggression. In terms of raw numbers, they attack more people than bears and wolves combined, but usually with only minor consequences. When harassed or startled by people or in the presence of a dog, moose may charge. Also, as with bears or any wild animal, moose who become habituated to being fed by people may act aggressively when denied food. During the fall mating season, bull moose may be aggressive toward humans due to the high hormone levels they experience during this time. Cow moose with young calves are very protective and will attack humans who come too close, especially if they come between mother and calf. Unlike other dangerous animals, moose are not territorial, and do not view humans as food, and will therefore usually not pursue humans if they simply run away.^[28] Like any wild animal, moose are unpredictable and should be given a respectful amount of space.

Vehicle collisions

Moose crossing a road, Alaska, USA

A moose's body structure, with a large heavy body suspended on long spindly legs, makes these animals particularly dangerous when hit by motor vehicles. Such collisions are often fatal for both the moose and motorist. Generally, upon impact the bumper of the car will break the moose's legs. The main body of the moose will then collide with the windscreen, often with disastrous effect to both motorist and animal. In a collision of this nature, a car's airbags may not deploy or be of much use if they do.^[29] These risks led to the development of a vehicle test referred to as the "moose test" (Swedish: Älgtest, German: Elchtest).

Moose warning signs are used on roads in regions where there is a danger of collision with the animal. The triangular warning signs common in Sweden, Norway and Finland have become coveted souvenirs among tourists traveling in these countries, causing the road authorities so much expense that the moose signs have been replaced with image-less generic warning signs in some regions.^[30]

A moose warning sign in Finland and Sweden.

Norwegian newspaper Aftenposten estimated in January 2008 that some 13,000 moose had died in collisions with Norwegian trains since 2000. The state agency in charge of railroad infrastructure (Jernbaneverket) plans to spend 80 million Norwegian kroner to reduce collision rate in the future by fencing the railways, clearing vegetation from near the tracks, and providing alternative snow-free feeding places for the animals elsewhere.^[31]

In the Canadian province of New Brunswick, collisions with moose are frequent enough that all new highways have fences to prevent moose from accessing the road, similar to how it has long been done in Finland, Norway and Sweden. Demonstratively, Highway 7 between Fredericton and Saint John, which has one of the highest frequencies of moose collisions in the province, does not have these fences, although it is extremely well signed.^[32] In Newfoundland and Labrador, it is recommended to motorists to use caution between dusk and dawn, because that is when moose are most active and most difficult to see, increasing the risk of collisions.^[33] Local moose sightings are often reported on radio stations so that motorists can take care while driving in particular areas.

Kaliforsky Beach Road, Kenai Alaska, trees and brush are trimmed along high moose crossing areas so that moose can be seen as they approach the road

Domestication

Domestication of moose was investigated in the Soviet Union before World War II. Early experiments were inconclusive, but with the creation of a moose farm at Pechora-Ilych Nature Reserve in 1949 a small-scale moose domestication program was started, involving attempts at selective breeding of animals based on their behavioural characteristics. Since 1963, the programme has continued at Kostroma Moose Farm, which had a herd of 33 tame moose as of 2003. Although at this stage the farm is not expected to be a profit-making enterprise, it obtains some income from the sale of moose milk and from visiting tourist groups. Its main value, however, is seen in the opportunities it offers for the research in the physiology and behaviour of the moose, as well as in the insights it provides into the general principles of animal domestication.

References

Further reading

• Alces, a journal devoted to the biology and management of moose (Alces alces)

External links

Wikimedia Commons has media related to: Alces alces

Wikispecies has information related to: Alces alces

• Alces alces (TSN 180703). Integrated Taxonomic Information System. Retrieved on 18 March 2006.
• A moose in the National Nature Park "Losinyj Ostrov" (Elk's Island) in Russia

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